[填空题]
The Moon orbits the Earth such6:ow f0xt(5 t4vhmmdu that tfny t,o6ho1, )jbna r9he same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat thehyf) nn6 ta ,oro9,j1b Moon as a particle orbiting the Earth.) $\times10^{ -6}$